Send Us E-Mail

Weekly Special

USB Twinax Kit
ES/PCI Twinax Kit
USB Twinax Console
ETU36 File Transfer
ETU400 File Transfer
OmniTerm/ES SW
All NLynx Products
Contact Us
Quick Links







Gemini Express Star Hub
for IBM i5, iSeries AS/400 and S/3X

ddlogo-sm.gif (4951 bytes)

Intelligent 5250 Active Star Hubs
for IBM i5, iSeries AS/400 and S/3X
For CAT5 / CAT6 Cable Installations

PLEASE NOTEThe Gemini Active Star Hub is no longer manufactured.  The Transition Network PowerStar IV Twinax-to-RJ45 Active Star Hub is available.   Click here to be taken to the IBM 7299 page.


  • Proven interoperability with 5250 compatibles

  • Standards-based 5250 “Star” hub distribution allows greater flexibility for adds, moves, and changes

  • High reliability digital design

  • Uses LAN cabling system - simple migration

  • IBM iSeries AS/400, AS/36 and Remote Controller compatible

  • Advanced noise filtering and signal conditioning allows the use of poorer grade cabling systems

  • Automatic data rate detection

  • Polarity insensitive as long as host and device polarities are the same.

  • Protocol transparent design ensures future 5250 compatibility

  • Meets or exceeds EIA/TIA wiring recommendations

NLynx continues to show its design leadership and commitment to the iSeries and AS/400 customers with the Gemini Express Dual Active Star Hub.

The Gemini Express (Hub) fully supports both the standard and express line speed (2Mbps) and throughput performance increases (up to 4 times faster!) available on the latest IBM iSeries AS/400e products.

The Gemini Express Star Hub transparently supports ALL features and performance gains available on the newer IBM AS/400e Advanced Series Controllers and 5250 Emulation adapters, such as TCP/IP over 5250.

The Gemini Express Hub has 2 Host Ports supporting 14 Device Ports available with either R-J11 or RJ-45 connectors. Other features include Advanced Noise Filtering, LED Port Diagnostics, Configurable UTP Pin Assignments, and a Field Replaceable wide-ranging Power Supply.

Click here for the Gemini Express Datasheet

Click here for additional information on the Gemini Express Hub

Purchase On Line




Gemini Express Hub

  • Host Ports/Device Ports: 2/14
  • Data Rate: ALL IBM 5250 protocol rates
  • Nominal input impedance: 100 ohms
  • Interface: RJ11 or RJ45
  • Active Pair: Configurable


  • Controller to GEMINI Hub: Up to 2000 ft.
  • GEMINI Hub to Device: Up to 2200 ft.
  • Diagnostic LED’s Power, host / device port activity & mode.


  • 100-240 VAC to +5VDC external power supply


  • Operating: 0 to 40 C
  • Storage: 0 to 85 C
  • Humidity: 95% non-condensing


  • 19" X 8.75" X 1.75" (1U)

Information Request Form

Wiring Products Information



iSeries & AS/400 Wiring Products Information Request Form

Have a salesperson contact me
Send product literature
Send company information
30 Days
60 Days
90 Days

* Required


Wiring Products Info Request - New 051116


Home |  | Products |  | Manufacturers |  | Weekly Special |  | Company & Contact Information |  | Feedback |
| Quick Links | | Site Map |  |
Warranty & Support |  | Privacy Policy |  | Shopping |  | Refund Policy |


PLEASE CLICK HERE to send us questions or comments about this web site.
Telephone:  USA 1-800-597-2525 / International 1-908-688-8100 / FAX 1-908-688-8160
2023 Twin Data Corporation